Sofa



FIG. 1 is a front elevational view of my new design of a sofa.

FIG. 2 is a right side elevational view thereof, the left side elevational view being a mirror image thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a sofa, as shown and described. 